Advanced Refrigeration
Double Door Refrigerator Inverter Course in Prayagraj
Master the mechanics and electronic controls of frost-free inverter refrigerators. Learn BLDC variable-speed compressor frequency control, electronic air distribution dampers, defrost thermistors, and safe R600a hydrocarbon charging.
Syllabus & Theory
- • Forced-air convection cooling and frost-free refrigeration cycles
- • Inverter control board output frequency checking (3-phase AC synthesis)
- • Motorized damper door regulation between freezer and fresh food sections
- • Defrost heaters, thermal cutoffs, bi-metal fuses, and NTC thermistors
- • R600a (Isobutane) thermodynamic properties and flame safety precautions
Hands-on Lab Skills
- • Testing sensor resistance curves in varied hot/ice water baths
- • Forcing manual defrost cycle via PCB test jumpers/pins
- • Precision R600a weight charging (accurate within ±2 grams) using digital scales
- • Lokring cold mechanical ring joining for leak-free brazeless connections
- • Diagnosing non-cooling in refrigerator compartment vs freezer icing
Related Courses
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Mechanical defrost timers, bi-metal switches, and glass heaters.
Single Door Inverter
Direct cool inverter electronics, low-wattage compressors, and R600a.
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Sub-zero commercial refrigeration, chest freezers, and digital controllers.